/* -LICENSE-START-
 ** Copyright (c) 2010 Blackmagic Design
 **
 ** Permission is hereby granted, free of charge, to any person or organization
 ** obtaining a copy of the software and accompanying documentation covered by
 ** this license (the "Software") to use, reproduce, display, distribute,
 ** execute, and transmit the Software, and to prepare derivative works of the
 ** Software, and to permit third-parties to whom the Software is furnished to
 ** do so, all subject to the following:
 ** 
 ** The copyright notices in the Software and this entire statement, including
 ** the above license grant, this restriction and the following disclaimer,
 ** must be included in all copies of the Software, in whole or in part, and
 ** all derivative works of the Software, unless such copies or derivative
 ** works are solely in the form of machine-executable object code generated by
 ** a source language processor.
 ** 
 ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 ** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 ** FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 ** SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
 ** FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
 ** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 ** DEALINGS IN THE SOFTWARE.
 ** -LICENSE-END-
 */
//
// CDeckLinkGLWidget.cpp
// OpenGLOutput
//

#include "CDeckLinkGLWidget.h"

CDeckLinkGLWidget::CDeckLinkGLWidget(QWidget* parent) : QGLWidget(parent)
{
    refCount = 1;
    deckLinkScreenPreviewHelper = CreateOpenGLScreenPreviewHelper();
}

void CDeckLinkGLWidget::initializeGL ()
{
    if (deckLinkScreenPreviewHelper != NULL)
    {
        mutex.lock();
            deckLinkScreenPreviewHelper->InitializeGL();
        mutex.unlock();
    }
}

void CDeckLinkGLWidget::paintGL ()
{
    mutex.lock();
    
		makeCurrent();
	
		glLoadIdentity();

		glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
		glClear(GL_COLOR_BUFFER_BIT);

		deckLinkScreenPreviewHelper->PaintGL();
	
    mutex.unlock();
}

void CDeckLinkGLWidget::resizeGL (int width, int height)
{
    mutex.lock();
        glViewport(0, 0, width, height);
    mutex.unlock();
}

HRESULT CDeckLinkGLWidget::QueryInterface (REFIID iid, LPVOID *ppv)
{
    *ppv = NULL;
    return E_NOINTERFACE;
}

ULONG CDeckLinkGLWidget::AddRef ()
{
    int		oldValue;

    oldValue = refCount.fetchAndAddAcquire(1);
    return (ULONG)(oldValue + 1);
}

ULONG CDeckLinkGLWidget::Release ()
{
    int		oldValue;

    oldValue = refCount.fetchAndAddAcquire(-1);
    if (oldValue == 1)
    {
        delete this;
    }

    return (ULONG)(oldValue - 1);
}

HRESULT CDeckLinkGLWidget::DrawFrame (IDeckLinkVideoFrame* theFrame)
{
    if (deckLinkScreenPreviewHelper != NULL)
    {
        deckLinkScreenPreviewHelper->SetFrame(theFrame);
        update();
    }
    return S_OK;
}
